312511213 has 12 divisors (see below), whose sum is σ = 367080672. Its totient is φ = 260619120.

The previous prime is 312511211. The next prime is 312511219. The reversal of 312511213 is 312115213.

It is not a de Polignac number, because 312511213 - 2¹ = 312511211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312511211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6723 + ... + 25888.

It is an arithmetic number, because the mean of its divisors is an integer number (30590056).

Almost surely, 2^312511213 is an apocalyptic number.

It is an amenable number.

312511213 is a deficient number, since it is larger than the sum of its proper divisors (54569459).

312511213 is an equidigital number, since it uses as much as digits as its factorization.

312511213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32692 (or 32655 counting only the distinct ones).

The product of its digits is 180, while the sum is 19.

The square root of 312511213 is about 17677.9866783523. The cubic root of 312511213 is about 678.6125205222.

Adding to 312511213 its reverse (312115213), we get a palindrome (624626426).

The spelling of 312511213 in words is "three hundred twelve million, five hundred eleven thousand, two hundred thirteen".